β-环糊精的新合成衍生物,单(6-脱氧-6-(1-1,2,3-三唑-4-基)-1-丙烷-3-O-(4-甲氧基苯基))β-环糊精( 1)和单(6-脱氧-6硫代(1-丙烷-3-O-(4-甲氧基苯基)))β-环糊精(2)被设计为抗癌药阿霉素的受体,可以潜在地减少不良反应在治疗期间的药物。在二甲基亚砜(DMSO)水溶液和水溶液中,阿霉素与新的环糊精衍生物形成包合物,形成常数为K s = 2.3×10 4和K s = 3.2×10 5 M –1分别用于环糊精1和2。与天然β-环糊精相比,复合物的稳定性高2-3个数量级,并且环糊精侧基连接基的柔性有助于这种稳定性。在氢键接受溶剂(例如纯DMSO)中,包括氢键和氯离子的缔合比环糊精衍生物腔中阿霉素的结合更有利。这与其中形成强包合配合物的水性介质相反。循环伏安法,UV-vis,11 H NMR以及在DMSO中的溶液和在水/ DMSO中的溶液的分子模型研究表
Generation of Alkyl Radicals from Thiols via Zinc Thiolates: Application for the Synthesis of
<i>gem</i>
‐Difluorostyrenes
作者:Vyacheslav I. Supranovich、Vitalij V. Levin、Vladimir A. Kokorekin、Alexander D. Dilman
DOI:10.1002/adsc.202100088
日期:2021.6.8
Reaction of thiols with α-(trifluoromethyl)styrenes under photocatalytic conditions leading to desulfurative allylic fluorine substitution is described. The reaction is performed by treatment of thiols with benzyl zinc chloride to generate zinc thiolates followed by visible light induced desulfurization by means of triphenylphosphine. Radicals formed after the C−S bond cleavage react with the double
favored over the binding of doxorubicin in the cavity of the cyclodextrin derivative. This contrasts with an aqueous medium in which a strong inclusion complex is formed. Cyclic voltammetry, UV–vis, 1H NMR, and molecular modeling studies of solutions in DMSO and of solutions in water/DMSO demonstrated that the two different modes of intermolecular interactionbetweendoxorubicin and the cyclodextrin derivative
β-环糊精的新合成衍生物,单(6-脱氧-6-(1-1,2,3-三唑-4-基)-1-丙烷-3-O-(4-甲氧基苯基))β-环糊精( 1)和单(6-脱氧-6硫代(1-丙烷-3-O-(4-甲氧基苯基)))β-环糊精(2)被设计为抗癌药阿霉素的受体,可以潜在地减少不良反应在治疗期间的药物。在二甲基亚砜(DMSO)水溶液和水溶液中,阿霉素与新的环糊精衍生物形成包合物,形成常数为K s = 2.3×10 4和K s = 3.2×10 5 M –1分别用于环糊精1和2。与天然β-环糊精相比,复合物的稳定性高2-3个数量级,并且环糊精侧基连接基的柔性有助于这种稳定性。在氢键接受溶剂(例如纯DMSO)中,包括氢键和氯离子的缔合比环糊精衍生物腔中阿霉素的结合更有利。这与其中形成强包合配合物的水性介质相反。循环伏安法,UV-vis,11 H NMR以及在DMSO中的溶液和在水/ DMSO中的溶液的分子模型研究表